Solar Sovereign says "In Stock".
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When I emailed them about that, they said:
"We get these directly from the manufacturer and they are in stock. If you order now, the lead time is roughly 1 week from order date. "
Not being honest lowers their credibility.
The Ruixu site is mum about stock status on all their products which makes me suspicious of any vendor. Every buyer wants to know when they will get the product and not telling them is either hiding something or your web store is lame about presenting useful information.
The complete absence of any youtube videos showing the actual Lithi2-16 is another clue they are still vaporware.
One thing I question is that the Ruixu rack batteries had a pluggable header with dry contact rapid shutdown inputs. This was useful in case the battery and the inverter did not get along with battery communications. But it appears this feature was removed on the Lithi2-16.
The user manual says, hopefully: "Rapid shut down function for North American market." but then never explains how to get that feature.
It appears that in order to get RSD features, you have to depend on the battery communications since there are no other obvious ways to do it. This could be limiting when it comes to which inverters will work with it and do RSD.
Also, the spec sheet says "UL1973/UL9540 pending". That will pose problems for code compliance until done. It could also mean early units might not be so marked and I don't know if they can retroactively mark them as compliant after the fact.
The user manual also says "Support a maximum of 96% DOD under off-grid and back-up application". So the nameplate capacity really isn't the capacity.
It looks like a very nice battery for a good price, but if you need something in this class, the EG4 units seem to be what you can get that is available now and with certs.
Mike C.